Tying Processing Parameters to the Microstructure and Mechanical Properties of Nanostructured FeNiZr Consolidated via the Field Assisted Sintering Technique
Autor: | Anthony J. Roberts, Christopher D. Haines, Kris A. Darling, Thomas L. Luckenbaugh, Sean Fudger |
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Rok vydání: | 2019 |
Předmět: |
lcsh:TN1-997
010302 applied physics Yield (engineering) Materials science Scanning electron microscope Metals and Alloys metals Spark plasma sintering Sintering 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Nanocrystalline material 0103 physical sciences Ultimate tensile strength oxide-dispersion-strengthening General Materials Science nanocrystalline Composite material 0210 nano-technology Porosity spark plasma sintering lcsh:Mining engineering. Metallurgy |
Zdroj: | Metals, Vol 9, Iss 4, p 436 (2019) Metals Volume 9 Issue 4 |
ISSN: | 2075-4701 |
Popis: | An oxide-dispersion-strengthened (ODS) nanostructured FeNiZr alloy was fabricated via high energy mechanical alloying, and subsequently consolidated by the field assisted sintering technique (FAST). A range of input parameters: Temperature, hold time and pressure were evaluated in an effort to optimize the mechanical response of the material. Improvements in density, up to 98.6% of theoretical, were observed with increasing consolidation temperature and hold time at the cost of decreasing hardness values resulting from microstructural coarsening. Hardness values decreased from 650 to 275 HV by increasing processing temperatures from 750 to 1100 ° C. The relationships between the varied processing parameters, microstructure and the experimentally measured yield and ultimate tensile strengths are discussed. Specifically, the effect of varying the temperature and hold time on the resulting porosity, as observed via scanning electron microscopy (SEM) in tensile and compression samples, is emphasized. |
Databáze: | OpenAIRE |
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